- A
Deploy firewall endpoints in at least two Availability Zones for high availability.
Ensures resilience.
- B
Use only stateless rules to minimize processing overhead.
Why wrong: Stateful rules are needed for application inspection.
- C
Configure stateful rule groups to inspect traffic at the application layer.
Provides deep packet inspection.
- D
Use Network Firewall only for outbound traffic filtering.
Why wrong: It can filter both inbound and outbound.
- E
Deploy the firewall in the same subnet as the workload for low latency.
Why wrong: Dedicated subnet is recommended.
Question 1,463 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are best practices for securing a VPC with AWS Network Firewall? (Choose two.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy firewall endpoints in at least two Availability Zones for high availability.
Option A is correct because deploying AWS Network Firewall endpoints in at least two Availability Zones ensures high availability and fault tolerance. If one AZ or firewall endpoint fails, traffic can be routed through the other, preventing a single point of failure. This aligns with AWS best practices for resilient network architectures.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy firewall endpoints in at least two Availability Zones for high availability.
Why this is correct
Ensures resilience.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use only stateless rules to minimize processing overhead.
Why it's wrong here
Stateful rules are needed for application inspection.
- ✓
Configure stateful rule groups to inspect traffic at the application layer.
Why this is correct
Provides deep packet inspection.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Network Firewall only for outbound traffic filtering.
Why it's wrong here
It can filter both inbound and outbound.
- ✗
Deploy the firewall in the same subnet as the workload for low latency.
Why it's wrong here
Dedicated subnet is recommended.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume stateless rules are sufficient for security or that Network Firewall is only for outbound filtering, but the exam tests the understanding that stateful inspection and multi-AZ deployment are critical for comprehensive protection and high availability.
Detailed technical explanation
How to think about this question
AWS Network Firewall uses a distributed architecture where firewall endpoints are elastic network interfaces (ENIs) in specific subnets, and traffic is routed through them via VPC route tables. Stateful rule groups leverage Suricata-compatible rule engines to inspect traffic up to Layer 7 (application layer), enabling deep packet inspection (DPI) for protocols like HTTP, TLS, and DNS. In a real-world scenario, deploying firewall endpoints in two AZs with an Network Load Balancer (NLB) in front ensures that traffic is load-balanced and failover is seamless, even during AZ outages.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy firewall endpoints in at least two Availability Zones for high availability. — Option A is correct because deploying AWS Network Firewall endpoints in at least two Availability Zones ensures high availability and fault tolerance. If one AZ or firewall endpoint fails, traffic can be routed through the other, preventing a single point of failure. This aligns with AWS best practices for resilient network architectures.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.
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